Adjustable spring hinge



Sept. 12, 1933. A. E. BUSCH 1,926,431

ADJUSTABLE SPRING HINGE Filed June 8, 1951 i'i l l' II; 5 l 7 9 WW/WPatented Sept. 12, 1933 UNITED jSraies .2x-mman...

PATENT oFFics hinge and enabling the door to be opened to nearly itsfull extent, with adaptability for adjustment to regulate the tension onthe springs that co-operate with the plungers and thus enable the leavesof the hinge to fully close; and so that the 'i door will beautomatically closed by the spring action. y

My improvements also provide a self-contained adjustable spring hingerequiring only the boring of holes in the jamb and the door for thereception or" the shells containing the springs and plungers, inaddition to the employment of the ordinary wood screws necessary tosecure the leaves of a butt hinge to the door and jamb.

Further advantages resulting from my present improvements will appearfrom the following description.

In the accompanying drawing:

Figure 1 is a front elevation, showing the hinge in position on a doorand jamb, certain parts being broken away;

Fig. 2 is a horizontal section through the hinge, jamb, and door, thehinge and door being closed;

Fig. 3 is a detail sectional View showing the position of the parts whenthe door is open to nearly its full extent; and

Fig. 4 is a detail perspective View of the duplex adjustable linkagebetween the plungers.

The door and jamb are shown at 1 and 2, re-

spectively.

The butt hinge to which the present improvements are applied, comprisesleaves 3, 4, these leaves having eyes 5 through which passes theA usualpintle 6. The leaves 3, 4, are provided with holes, not shown, throughwhich pass wood screws, not shown, which are entered in the door andjamb 1, 2.

Connected to leaves 3, 4 as, for instance by screw threads 7 are barrelsor shells 8, 9. The

' connection may be in the form of internally screw Y 9 are thus rigidlyconnected to the leaves 3, 4.

Fixed in any suitable manner within the shells 8, 9 are tubular bushingsl0 which serve as spring abutments, as will presently appear. n

The ends or theshells 8, 9 may be closed by suitable screw plugs 1l.

Contained within the shells 8, 9 are plungers 12, 13 having stemsrespectively shown at 14, said stems being surrounded by extensible coilsprings, respectively shown at 15 which bear against the respectiveplungers 12, 13 and the bushings 10 and tend to force the plungers inopposite directions and away from the leaves 3, 4.

The stems 14 are connected by an improved duplex linkage which is shown,mainly, in Fig. 4. This linkage comprises a solid or one-piece link 16which is pivoted, preferably detachably, at 17 to the stem 14 for theplunger. The other part of the duplex linkage is composed of two piecesor members, one of which is a flat link 17 pivoted preferably detachablyto the stem 14 of the plunger 13, as shown at 18. The remaining part ofthis adjustable section has a coupling 19 which is detachably pivoted at20 to the link 16. The coupling 19 has a slotted end 21 which receivesthe reduced end 22 of the link 16.

The interior of the coupling 19 and the exterior of the link or section17 are screw threaded, as shown at 23.

A transverse hole 24 is provided in coupling 20 to receive a Spanner orany suitable tool for turning the coupling 19 on the member 17 to changethe effective length of the compound link 17', 19. This can be done bytaking out the pivotal connection 20. Thus, any desired adjustment maybe obtained which regulates the tension of the springs 15 and enablesthe door to fully close, beside providing for a take-up action tocompensate for wear and decreased power. l

Furthermore, the provision of a duplex linkage comprising the parts 16,17', 19, and the adjustability of the parts 17 and 19 permits of a muchwider vor greater opening of the door (nearly 180) than has beenpossible with spring hinges of which I have knowledge.

The spring may be readily applied to the door and its jarnb merely byboring in them holes of a size which will permit snug insertion of theshells 8, 9and then the screws, not shown, are passed through the leaves3, 4 into the door and jamb.

Bushings 10 may be provided, as shown at 25, to accommodate the link 16when the hinge is spread open, as shown in Fig. 3.

My improved hinge has many advantages, among which may be mentionedneatness, concealment, self-closing, adjustability of tension, andprovision for opening through an angle of nearly 180.

What I claim is: l. In an adjustable spring hinge, the combination ofstems, expansion coil springs acting on said stems, adapted to' positionsaid stems in alinement, and a linkage connecting the stems together,said linkage being composed of a plurality of sections joined togetherand including, as a part thereof means whereby the over-all length ofthe linkage may be shortened or lengthened to regulate the tension ofthe coil springs and to compensate for wear and decreased spring power.

2. In an adjustable spring hinge, the combination of stems, expansioncoil springs acting on said stems, adapted to position said sterns inalnement, and a linkage connecting the stems together, said linkagecomprising a plurality of sections joined together, of which one sectionis composed of parts which are adjustably connected together so that theparts of said section may be extended or contracted in relation to eachother, thereby to lengthen or shorten the overall length of said linkagebetween the points where it is connected to the respective stems toregulate the tension of the coil springs and to compensate for wear anddecreased spring power. 3. In an adjustable spring hinge, thecombination of stems, expansion coil springs acting on said stems,adapted to position said stems in alinement, and a linkage connectingthe stems together, said linkage being composed of a plurality ofsections joined together, one of said sections embodying parts connectedtogether by a screw threaded extensible and contractible joint whichpermits said parts to be relatively extended or relatively contracted,thereby to change the effective length of the linkage between the pointswhere said linkage is joined to the aforesaid stems to regulate thetension of the coil springs and to compensate for wear and decreasedspring power. Y

AUGUST ERNST BUSCH.

